html css默认样式,HTML4默认CSS样式表-优快云博客

本文详细介绍了HTML和CSS在网页布局中的应用，包括各种标签的显示方式、字体样式、列表处理、表格展示以及区块元素的对齐和间距设置。通过对CSS规则的解析，帮助读者理解如何有效地控制网页元素的样式。

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html, address, blockquote, body, dd, div, dl, dt, fieldset, form,

frame, frameset, h1, h2, h3, h4, h5, h6, noframes, ol, p, ul,

center, dir, hr, menu, pre {

display: block;

unicode-bidi: embed

}

li {

display: list-item

}

head {

display: none

}

table {

display: table

}

tr {

display: table-row

}

thead {

display: table-header-group

}

tbody {

display: table-row-group

}

tfoot {

display: table-footer-group

}

col {

display: table-column

}

colgroup {

display: table-column-group

}

td, th {

display: table-cell

}

caption {

display: table-caption

}

th {

font-weight: bolder;

text-align: center

}

caption {

text-align: center

}

body {

margin: 8px

}

h1 {

font-size: 2em;

margin: .67em 0

}

h2 {

font-size: 1.5em;

margin: .75em 0

}

h3 {

font-size: 1.17em;

margin: .83em 0

}

h4, p, blockquote, ul, fieldset, form, ol, dl, dir, menu {

margin: 1.12em 0

}

h5 {

font-size: .83em;

margin: 1.5em 0

}

h6 {

font-size: .75em;

margin: 1.67em 0

}

h1, h2, h3, h4, h5, h6, b, strong {

font-weight: bolder

}

blockquote {

margin-left: 40px;

margin-right: 40px

}

i, cite, em, var, address {

font-style: italic

}

pre, tt, code, kbd, samp {

font-family: monospace

}

pre {

white-space: pre

}

button, textarea, input, select {

display: inline-block

}

big {

font-size: 1.17em

}

small, sub, sup {

font-size: .83em

}

sub {

vertical-align: sub

}

sup {

vertical-align: super

}

table {

border-spacing: 2px;

}

thead, tbody, tfoot {

vertical-align: middle

}

td, th, tr {

vertical-align: inherit

}

s, strike, del {

text-decoration: line-through

}

hr {

border: 1px inset

}

ol, ul, dir, menu, dd {

margin-left: 40px

}

ol {

list-style-type: decimal

}

ol ul, ul ol, ul ul, ol ol {

margin-top: 0;

margin-bottom: 0

}

u, ins {

text-decoration: underline

}

br:before {

content: "\A";

white-space: pre-line

}

center {

text-align: center

}

:link, :visited {

text-decoration: underline

}

:focus {

outline: thin dotted invert

}

BDO[DIR="ltr"] {

direction: ltr;

unicode-bidi: bidi-override

}

BDO[DIR="rtl"] {

direction: rtl;

unicode-bidi: bidi-override

}

*[DIR="ltr"] {

direction: ltr;

unicode-bidi: embed

}

*[DIR="rtl"] {

direction: rtl;

unicode-bidi: embed

}

@media print {

h1 {

page-break-before: always

}

h1, h2, h3, h4, h5, h6 {

page-break-after: avoid

}

ul, ol, dl {

page-break-before: avoid

}